1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2017 Microchip
4 * Wenyou Yang <wenyou.yang@microchip.com>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <env.h>
10 #include <w1.h>
11 #include <w1-eeprom.h>
12 #include <dm/device-internal.h>
13
14 #define AT91_PDA_EEPROM_ID_OFFSET 15
15 #define AT91_PDA_EEPROM_ID_LENGTH 5
16 #define AT91_PDA_EEPROM_DEFAULT_BUS 0
17
18 char *get_cpu_name(void);
19
dummy(void)20 void dummy(void)
21 {
22 }
23
24 #if defined CONFIG_W1
at91_pda_detect(void)25 void at91_pda_detect(void)
26 {
27 struct udevice *bus, *dev;
28 u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
29 int ret;
30 int pda = 0;
31
32 ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
33 if (ret)
34 goto pda_detect_err;
35
36 for (device_find_first_child(bus, &dev);
37 dev;
38 device_find_next_child(&dev)) {
39 ret = device_probe(dev);
40 if (ret) {
41 continue;
42 } else {
43 ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
44 (u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
45 if (ret)
46 goto pda_detect_err;
47 break;
48 }
49 }
50 pda = simple_strtoul((const char *)buf, NULL, 10);
51
52 switch (pda) {
53 case 7000:
54 if (buf[4] == 'B')
55 printf("PDA TM7000B detected\n");
56 else
57 printf("PDA TM7000 detected\n");
58 break;
59 case 4300:
60 printf("PDA TM4300 detected\n");
61 break;
62 case 5000:
63 printf("PDA TM5000 detected\n");
64 break;
65 }
66
67 pda_detect_err:
68 env_set("pda", (const char *)buf);
69 }
70 #else
at91_pda_detect(void)71 void at91_pda_detect(void)
72 {
73 }
74 #endif
75
at91_prepare_cpu_var(void)76 void at91_prepare_cpu_var(void)
77 {
78 env_set("cpu", get_cpu_name());
79 }
80